Did you just stumble upon a download or a file on your computer that is digitally signed by Nusphere? If so, please read on.
You will typically see Nusphere when running the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the additional details from the Nusphere digital signature with the following steps:
Here is a screenshot of a file that has been signed by Nusphere:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This implies that the file has been published by Nusphere and that the file has not been tampered with.
If you click the View Certificate button shown in the screencap above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also examine the address for Nusphere, such as the street name, city and country.
Thawte Code Signing CA - G2 and DigiCert Assured ID Code Signing CA-1 has issued the Nusphere certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Nusphere files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/46 | NuSphereIEBar64.dll |
| 0/49 | NuSphereIEBar64.dll |
| 0/57 | NuSphereIEBar64.dll |
The detection percentage is based on that I've collected 152 scan reports for the Nusphere files. 0 of these scan results came up with some sort of detection. You can review the full details of the scan results by examining the files listed above.
The analysis is done on certificates with the following serial numbers: